Filter



Oct. 15, 1940. l.. w. WILLIAMS FILTER 2 Sheets-Sheet 1 Filed May 14, y1938 Oct. 15, 1940.Y L.. w; WILLIAMS FILTER Filed May 14, 1958 2 Sheets-Shes; 2

Patented Oct. 15, 1940 PATENT oFFicE FILTER vLewis W. williams, short mus, N. J., assignor to Motor Improvements, Inc., Newark, N. J., a corporation of Delaware Application May 14,

2 Claims.

. This invention relates to filters and more especially to filters for use in connection with the lubrication and fuel systems of internal combustion engines such, for example, as Diesel engines.

There are two different classifications of im- -purities usually present in the lubricant of an internal combustion engine, one of which may be defined as abrasive particles of such size as to be injurious to the working parts of the engine if not removed from the lubricant and the other of which may be defined as solid particles of l' such minute size as not to'be injurious to the working parts of the engine and to effect the color of the lubricant rather than its lubricating r quality. It is important that all impurities of the first classification be removed from lubricant supplied to the bearings for protection thereof and it is desirable that the impurities of the second classification be removed to improve the general character and appearance of the lubricant.

According to this invention, oil drawn from the engine crankcase is supplied to a filter capable of removing impurities ofthe first classification from oil passing through it at a relatively high rate and the oil discharged from such filter is supplied in part to the bearings and in part to a filter capable of removing the impurities of the second classification, the discharge from the second filter being returned to the crankcase. With this arrangement, the lubricant is freed of all impurities so that the bearings are fully protected against injury from abrasive particles in the lubricant and the oil is maintained bright and clear because of the removal of the colorproducing impurities of the second classification. Preferably, the two filters are provided with a common base directly attachable to the-crankcase wall and having slots in alinement with passageways formed in the crankcase wall for passing oil from the crankcase through the rst filter to the bearings and passageways for leading oil from the outlet of the first filter to the inlet of the second filter andA a further passageway in alinement with a passageway inthe crankcase wall for returning oil from the outlet of the second lter to the crankcase. Oil' is supplied from the outlet of the first filter directly to the inlet of the second filter through a pas 50 sageway of minimum length. A filtering unit satisfactory for removing impurities of the first 55 ing unit satisfactory for removing impurities of 193s, serial No. 207,881

(ci. 21o-165) the second classification is the absorption type filter illustrated in the Patent to Layte, et al. Patent No. 2,158,512. Each filtering unit is enclosed in a casing which is detachably associated with the base to form a container for the filtering unit. On the same base is arranged a fuel filter consisting of any suitable type of filtering unit enclosed by a casing detachably associated with the base. The base is provided with inlet and outlet passageways for directing fuel through the filtering unit and the crankcase wall is provided with passageways in alinement therewith for facilitating the flow of fuel to and from the filter.

The features of novelty of the present invention will be apparent from the following specifica-tion and accompanying drawings, wherein:

Fig. 1 is an elevation partially in section of a combined lubricant and filtering system embodying the invention;

Fig. 2 is a section substantially on the line 2--2 of Fig. 1;

Fig. 3 is a section on the line 3-3 of Fig. 2, and

Fig. 4 is a section on the line -li of Fig. 2;

VIn the drawings, lli designates the wall of a crankcase of an internal combustion engine and il designates a pad provided on such wall. A

cast metal base I2 has a fiat-face ange i3 engaging the pad Il and is attached thereto by bolts It passing through holes provided in the fiange for that purpose. The base is provided with a plurality of sumps l5, i6 and Il in each of which is provided a hollow boss I8, i9 and 2i) respectively. In the flange i3 are provided a plurality of slots 2|, 22 and 23 of which 2l communicates through the passageway 24 with the lboss I8, 22 communicates through thev passageway 25 with the sump I5 and 23 communicates with the ,slot 22 through a passageway 26 provided with a pressure regulating valve 2l. Between the slot 22 and the boss I8 is a by-pass 28 controlled by a spring-pressed check valve 29.

The crankcase wall is provided with an aperture communicating with a pipe 22 for supplying oil to theslot 22 and an aperture communicating with the pipe 2Ia for leading oil from the slot 2l to the bearings. Also, the crankcase wall is providedlwith an aperture (not shown) communicating with the slot 23 for leading oil therefrom to the crankcase.

A cylinder 30 fits into a groove in the base and is detachably associated with the base through the medium of a hollow stud 3| threaded into the boss I8 and engaging a perforated disk 32 which bears against; an inwardly directed rib 33 in the casing 3|).A A post 3d is threaded into the stud 3| and toits upper end is threaded a nut 35 which clamps the cover 38 to the cylinder 30. Within the cylinder 38 is provided a metal ribbon filtering unit 3l of the type illustrated in Liddell Patent No. 2,042,537, the interior of the filtering unit communicating with the hollow bottom portion of the post 34 through the aperture 38.

Oil to be filtered is supplied to the slot 22 and through the passageway 25 is delivered into the interior of the casing around the filtering unit.

A cylinder 30a is attached to the base through the intermediary of a hollow stud 3Ia which engages a perforated disk 32a resting upon an inwardly directed rib 33a of the cylinder 30a. A hollow post 39 has its lower end threaded into the stud 3|a and to its upper end is threaded a nut 40 which clamps the cover 4I to the cylinder 30a. Surrounding the post is a filtering unit 38 of the absorption type disclosed in the Patent to Layte, et al. Patent No. 2,158,512 and is provided with a distributor by means of which oil is supplied to the interior of the unit. In the flange I3 is provided a slot 43 which communicates through the passageway 44 with the slot 2|'v and also communicates with the bottom of the boss I8. municates through thepassageway 46 with the sump I6. The pad II is provided with a passageway 45a which communicates with the slot 45 for the purpose of returning oil therefrom to the crankcase. Oil is delivered from the slot 2| through the passageway 44 in slot 43 to the bottom of the boss I9 and then flows through the restricted orifice 41 in the bottom of the stud 3Ia into the stud and through the post 39 into the interior of the filtering unit 38. The'V filtered oil in the casing passes through the apertures in the disk 32a and is discharged through the passageway 46 and slot 45 into the crankcase.

A third filtering unit of the same structure as the first described filtering unit is supported by the base as previously described except that there is no by-pass passage and no pressure regulating valve. The iiange I3 is provided with slots 22a A slot 45 in the flange I3 com-A and 23a which register-with apertures in the crankcase wall and communicate respectively with the sump I1. and boss 20. The fuel to be filtered is supplied by means, not shown, to the crankcase wall passageway in alinement with the slot 22a and is discharged through means, not shown, communicating with the passageway in the crankcase wall registering with the slot 23a.

Except as above vpointed out, the third filtering Under somelcircumstances it is desirable to provide the fuel oil filter with exterior piping. For such use, the fuel filter is provided with the inlet and outlet passages 24h and 25h. The set ofinlet and outlet passages not used is suitably plugged.

I claim:

1. In combination with anengine crankcase wall having three apertures, a base having a flat faced fiange for attachment to said wall in overlying relation to said, apertures and provided with a pair of sumps, a hollow boss in each sump, a first and a second filtering unit communicating with said bosses, inlet and outlet passages in said base for said rst filtering unit, inlet andoutlet passages in said base for said second filtering unit, a slot in said fianged face communicatingwith one first unit passage. a second slot in said fianged face communicating with the/remaining first unit passage and one second unit passage, and a third slot in said fianged face communicating with the remaining second unit passage, each of said slots being in register with one crankcase wall aperture.

2. In combination with an engine crankcase wall having three apertures, a base having a flat faced flange for attachment to said wall in overlying relation to said apertures and provided with a pair of sumps, a hollow boss in each sump, a rst and a second filtering unit communicating with said bosses, a pair of slots in said fianged face communicating one with the first unit sump and the other with both the first unit boss and the second unit boss and a third slot in said flanged face communicating vn'th the secod unit sump, each of said slots being in register with one crankcase wallaperture.

LEWIS W. WILLIAMS, 

